US20090191438A1 - Fuel cell system - Google Patents

Fuel cell system Download PDF

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Publication number
US20090191438A1
US20090191438A1 US12/301,284 US30128407A US2009191438A1 US 20090191438 A1 US20090191438 A1 US 20090191438A1 US 30128407 A US30128407 A US 30128407A US 2009191438 A1 US2009191438 A1 US 2009191438A1
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United States
Prior art keywords
temperature
low
countermeasures
fuel cell
control
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Abandoned
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US12/301,284
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English (en)
Inventor
Nobuo Fujita
Masahiro Okuyoshi
Masataka Ota
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Toyota Motor Corp
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Individual
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Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA reassignment TOYOTA JIDOSHA KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OTA, MASATAKA, OKUYOSHI, MASAHIRO, FUJITA, NOBUO
Publication of US20090191438A1 publication Critical patent/US20090191438A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04955—Shut-off or shut-down of fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04225—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04228—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during shut-down
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/0432—Temperature; Ambient temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to a fuel cell system.
  • a method is suggested in which at a predetermined timing after the stopping of the fuel cell system has been requested (a command for turning off an ignition key or the like), temperature information such as an ambient temperature is acquired, and the freezing of the water is predicted from the temperature information to inform a user of the same (e.g., see Patent Document 1).
  • the user judges, based on the prediction result displayed in a display or the like (e.g., “there is a possibility of the freezing”), whether or not control (warm-up processing or the like) for low-temperature countermeasures is required, and the user presses a low-temperature countermeasure performing button or the like in accordance with the judgment result. Therefore, the control for the low-temperature countermeasures is performed only at a time when the user judges that the control is necessary. According to such a constitution, the control for the low-temperature countermeasures is not unnecessarily performed, so that the unnecessary consumption of a fuel (hydrogen or the like) can be prevented.
  • a fuel hydrogen or the like
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2005-108832
  • the present invention has been developed in view of the above situation, and an object thereof is to provide a fuel cell system which can inform the user of the input of a control command for low-temperature countermeasures, if necessary, at a proper timing.
  • a fuel cell system is a fuel cell system in which control for low-temperature countermeasures is performed at a time when a request for the low-temperature countermeasures is input from a user, characterized by comprising: judgment means for judging whether or not the system satisfies set conditions for the time period from the input of a start command to the input of a stop command of the system; and informing means for urging the user to input the request for the low-temperature countermeasures during system start in a case where it is judged that the set conditions are satisfied.
  • the judgment means preferably repeatedly executes the judgment at predetermined time intervals. According to such a constitution, the judgment can be performed in accordance with the use situation of the system or the like.
  • the temperature conditions of the system are temperature conditions concerning at least one of the ambient temperature of the system and the part temperature of the system.
  • the fuel cell system according to the present invention is a fuel cell system in which control for low-temperature countermeasures is performed, characterized by comprising: first judgment means for judging whether or not a temperature concerning the system satisfies first set conditions for the time period from the input of a start command to the input of a stop command of the system; second judgment means for judging whether or not the change of the temperature concerning the system with an elapse of time satisfies second set conditions in a case where it is judged that the first set conditions are satisfied; and control means for performing the control for the low-temperature countermeasures in a case where it is judged that the second set conditions are satisfied.
  • the control for the low-temperature countermeasures (sweep processing at the end of the system or the like) is performed, the user can securely be informed with, for example, a character message, a voice message or the like, and the user does not have any uncomfortable feeling or false recognition.
  • the above constitution is characterized in that the temperature concerning the system is an ambient temperature, the first judgment means judges whether or not the ambient temperature is lower than a set reference temperature, and the second judgment means judges whether or not the change of the ambient temperature with an elapse of time is a set difference threshold value or more in a case where the ambient temperature is lower than the set reference temperature.
  • the user can be informed of a message for urging the input of a control command for low-temperature countermeasures, if necessary, at a proper timing.
  • FIG. 1 is a diagram showing the constitution of a fuel cell system according to a first embodiment
  • FIG. 2 is a flow chart showing the operation of the fuel cell system according to the embodiment
  • FIG. 3 is a graph showing a relation between an ambient temperature and a remote-part temperature according to the embodiment
  • FIG. 4 is a diagram illustrating a display screen according to the embodiment.
  • FIG. 5 is a flow chart showing the operation of a fuel cell system according to a second embodiment
  • FIG. 6 is a flow chart showing the operation of a fuel cell system according to a third embodiment.
  • FIG. 7 is a diagram showing a change of an ambient temperature with an elapse of time according to the embodiment.
  • FIG. 1 is a diagram showing the main constitution of a fuel cell system 100 according to a first embodiment.
  • a fuel cell system to be mounted on a vehicle such as a fuel cell hybrid vehicle (FCHV), an electric car or a hybrid car is assumed.
  • FCHV fuel cell hybrid vehicle
  • the present invention may be applied not only to the vehicle but also to any type of mobile body (e.g., a ship, an airplane, a robot or the like), a stational power source or the like.
  • a fuel cell 40 is means for generating power from a supplied reactant gas (a fuel gas or an oxidizing gas), and various fuel cells such as a solid polymer type, a phosphoric type and a molten carbon salt type may be used.
  • the fuel cell 40 has a stack structure in which a plurality of unitary cells including an MEA and the like are laminated in series.
  • the output voltage (hereinafter referred to as the FC voltage) and the output current (hereinafter referred to as the FC current) of this fuel cell 40 are detected a voltage sensor 140 and a current sensor 150 , respectively.
  • a fuel gas such as a hydrogen gas is supplied from a fuel gas supply source 10 to a fuel pole (an anode) of the fuel cell 40 , whereas an oxidizing gas such as air is supplied from an oxidizing gas supply source 70 to an oxygen pole (a cathode).
  • the fuel gas supply source 10 is constituted of, for example, a hydrogen tank, various valves and the like, and a valve open degree, an ON/OFF time or the like is adjusted to control the amount of the fuel gas to be supplied to the fuel cell 40 .
  • the oxidizing gas supply source 70 is comparative exampled of, for example, an air compressor, a motor for driving the air compressor, an inverter and the like, and the rotation number of the motor or the like is adjusted to adjust the amount of the oxidizing gas to be supplied to the fuel cell 40 .
  • a battery 60 is a chargeable/dischargeable secondary cell, and is constituted of, for example, a nickel hydrogen battery or the like. Needless to say, instead of the battery 60 , a chargeable/dischargeable accumulate (e.g., a capacitor) other than the secondary cell may be provided. This battery 60 is connected in parallel to the fuel cell 40 via a DC/DC converter 130 .
  • An inverter 110 is, for example, a PWM inverter of a pulse width modulation system, and converts direct-current power output from the fuel cell 40 or the battery 60 into three-phase alternating power in accordance with a control command given from a control unit 80 to supply the power to a traction motor 115 .
  • the traction motor 115 is a motor (i.e., a power source of a mobile body) for driving wheels 116 L, 116 R, and the rotation number of such a motor is controlled by the inverter 110 .
  • This traction motor 115 and the inverter 110 are connected to a fuel cell 40 side.
  • the DC/DC converter 130 is a full bridge converter constituted of, for example, four power transistors and a driving circuit for exclusive use (both are not shown in the drawing).
  • the DC/DC converter 130 includes a function of raising or lowering a DC voltage input from the battery 60 to output the voltage to the fuel cell 40 side, and a function of raising or lowering a DC voltage input from the fuel cell 40 or the like to output the voltage to a battery 60 side.
  • the charging/discharging of the battery 60 is realized by the function of the DC/DC converter 130 .
  • Auxiliary devices 120 such as a vehicle auxiliary device and an FC auxiliary device are connected between the battery 60 and the DC/DC converter 130 .
  • the battery 60 is a power source for these auxiliary devices 120 .
  • the vehicle auxiliary devices are power apparatuses (an illumination apparatus, an air conditioning apparatus, a hydraulic pump, etc.) for use in driving a vehicle or the like
  • the FC auxiliary devices are various power apparatuses (a pump for supplying the fuel gas or the oxidizing gas, etc.) for use in operating the fuel cell 40 .
  • the control unit 80 is constituted of a CPU, an ROM, an RAM and the like, and centrally controls system sections based on sensor signals input from the voltage sensor 140 , the current sensor 150 , a temperature sensor 50 which detects the temperature of the fuel cell 40 , an SOC sensor which detects the charged state of the battery 60 , an accelerator pedal sensor which detects the open degree of an accelerator pedal and the like. Moreover, the control unit 80 according to the present embodiment performs control for low-temperature countermeasures, if necessary, not only after the stopping of the fuel cell system has been requested but also for the time period from a start request (a start command) of the fuel cell system to a stop request (a stop command) of the fuel cell system (details will be described later).
  • a display device (informing means) 160 is constituted of a liquid crystal display, various lamps or the like, and a voice output device (informing means) 180 is constituted of a speaker, an amplifier, a filter or the like.
  • the control unit 80 informs various messages by use of the display device 160 and the voice output device 170 .
  • the messages to be informed include a message concerning the control for low-temperature countermeasures such as warm-up processing and sweep processing (e.g., display of a message for urging the input of a control command for the low-temperature countermeasures, etc.; details will be described later).
  • An input device 170 is constituted of a keyboard, a mouse, a touch panel, various operation switches and the like.
  • the operation switches include a special switch (hereinafter referred to as the low-temperature countermeasure switch) SW 1 for inputting a control start/control stop command for the low-temperature countermeasures.
  • a user turns on or off this low-temperature countermeasure switch SW 1 to instruct the control start/control stop for the low-temperature countermeasures.
  • An ambient temperature sensor 190 is a sensor for detecting an ambient temperature, and is provided on, for example, the outer periphery of the vehicle.
  • a part temperature sensor 195 is a sensor which detects the temperatures of various parts (various auxiliary devices, etc.) mounted on the vehicle, and is attached to a part as a detection target.
  • the part temperature sensor 195 is attached to a part (hereinafter referred to as the remote part) installed in a portion remote from a heat source (a portion in which the flow rate of a gas to be supplied via a heat source such as an exhaust outlet or a fuel cell or the like).
  • the part to which the part temperature sensor 195 is to be attached is arbitrarily decided.
  • the control unit 80 determines a low temperature based on the ambient temperature detected by the ambient temperature sensor 190 and the temperature (hereinafter referred to as the remote-part temperature) of the remote part detected by the part temperature sensor 195 to judge whether or not to inform the user of a message for urging the input of the control command for the low-temperature countermeasures.
  • FIG. 2 is a flow chart showing the operation of the fuel cell system 100 .
  • the control unit 80 On detecting that the start request (the turning-on of an ignition switch or the like) of the system has been input (Step S 1 ), the control unit 80 decides the low temperature based on an ambient temperature To detected by the ambient temperature sensor 190 and a remote-part temperature Tp detected by the part temperature sensor 195 (Step S 2 ). This will be described in detail.
  • the control unit (judgment means) 80 compares the ambient temperature To or the remote-part temperature Tp with a preset reference temperature Ts (e.g., 0° C.) to judge whether or not the ambient temperature To or the remote-part temperature Tp is lower than the reference temperature Ts.
  • a preset reference temperature Ts e.g., 0° C.
  • FIG. 3 is a diagram showing a relation between the ambient temperature and the remote-part temperature.
  • the abscissa indicates the ambient temperature
  • the ordinate indicates the remote-part temperature.
  • the control unit 80 judges whether or not the ambient temperature To or the remote-part temperature Tp is lower than 0° C.
  • the temperature Tp of the remote part (a part c in FIG. 3 ) having the lowest temperature is lower than 0° C.
  • the remote part whose temperature is to be used is arbitrary.
  • the control unit 80 judges that the control for the low-temperature countermeasures is unnecessary, and starts ordinary run (Step S 2 ⁇ Step S 10 ).
  • the control unit (the informing means) 80 judges that the ambient temperature To or the remote-part temperature Tp is lower than 0° C. (see a hatched portion shown in FIG. 3 )
  • the message for urging the input of the control command for the low-temperature countermeasures is displayed in the display device 160 as shown in FIG. 4
  • the voice message for urging the input of the control command is output from the voice output device 180 (Step S 2 ⁇ Step S 3 ).
  • the user confirms the message displayed in the display device 160 or the like to judge whether or not to execute the control for the low-temperature countermeasures.
  • the user turns on the low-temperature countermeasure switch SW 1 .
  • the control unit 80 turns on a low-temperature countermeasure flag stored in a memory (not shown) (Step S 5 ), and then stops the informing of the message.
  • Step S 6 the control unit 80 judges whether or not the stopping of the system (the turning-off of the ignition switch) has been requested (Step S 6 ), and returns to Step S 2 , when it is judged that the stopping has not been requested. In consequence, a series of processing including the above low-temperature judgment is repeatedly executed.
  • Step S 4 the control unit 80 advances to Step S 6 to judge whether or not the stopping of the system has been requested. In a case where it is judged that the stopping has not been requested, the control unit returns to Step S 2 in the same manner as described above, thereby executing the above series of processing.
  • Step S 4 In a case where it is not detected in Step S 4 that the low-temperature countermeasure switch SW 1 has been turned on (Step S 4 ; NO), the control unit 80 advances to Step S 6 to judge whether or not the stopping of the system has been requested. Even after the ordinary run is started, the control unit 80 advances to Step S 6 to perform similar processing (Step S 10 ⁇ Step S 6 ).
  • the control unit 80 judges whether or not the low-temperature countermeasure switch SW 1 is turned on with reference to the low-temperature countermeasure flag.
  • the low-temperature countermeasure switch SW 1 is turned off (Step S 7 ; NO)
  • processing stop processing such as the stop of the supply of the gas is performed (Step S 9 ).
  • Step S 7 when the low-temperature countermeasure switch SW 1 is turned on (Step S 7 ; YES), sweep processing or the like is executed as the control for the low-temperature countermeasures (Step S 8 ).
  • Such sweep processing can be executed to decrease a water content accumulated in a pipe or the like, and it is possible to suppress a problem that the water accumulated in the pipe freezes and damages the pipe.
  • the control unit 80 performs the stop processing in the same manner as described above (Step S 9 ), thereby ending the processing.
  • the ambient temperature To or the remote-part temperature Tp is lower than 0° C. for the time period from the start request to the stop request of the system, and the message for urging the control command for the low-temperature countermeasures is informed in a case where either temperature is lower than 0° C., so that it is possible to suppress a problem that the user misses such a message.
  • the message for urging the input of the control command for the low-temperature countermeasures is informed, but such a message may be informed only in a case where both the conditions are satisfied.
  • the low-temperature countermeasures may be performed even when the switch is not turned on after the informing.
  • FIG. 5 is a flow chart showing the operation of a fuel cell system 100 according to the second embodiment. It is to be noted that steps corresponding to those of the flow chart shown in FIG. 2 are denoted with the same reference numerals, and detailed description thereof is omitted.
  • a control unit 80 decides a low temperature based on an ambient temperature To detected by an ambient temperature sensor 190 and a remote-part temperature Tp detected by a part temperature sensor 195 (Step S 2 ).
  • Step S 2 When the ambient temperature To or the remote-part temperature Tp is 0° C. or more, the control unit 80 judges that control for low-temperature countermeasures is unnecessary, and starts ordinary run (Step S 2 ⁇ Step S 10 ). On the other hand, in a case where the control unit 80 judges that the ambient temperature To or the remote-part temperature Tp is lower than 0° C., the control unit 80 does not urge the user to judge whether or not to execute the control for the low-temperature countermeasures, and turns on a low-temperature countermeasure switch SW 1 (Step S 130 ). When the low-temperature countermeasure switch SW 1 is turned on, the control unit 80 advances to Step S 6 to judge whether or not the stopping of the system has been requested. In a case where it is judged that the stopping has not been requested (Step S 6 ; NO), the control unit returns to Step S 2 to execute the above series of processing in the same manner as described above.
  • Step S 6 On detecting that the stopping of the system has been requested (Step S 6 ; YES), sweep processing or the like is executed as the control for the low-temperature countermeasures.
  • Such sweep processing can be executed to decrease a water content accumulated in a pipe or the like, and it is possible to suppress a problem that water accumulated in the pipe freezes and damages the pipe.
  • the control unit 80 performs the stop processing in the same manner as described above (Step S 9 ), thereby ending the processing.
  • the low-temperature countermeasure switch SW 1 is automatically turned on in a case where either temperature is lower than 0° C., so that the control for the low-temperature countermeasures can securely be executed.
  • the low-temperature countermeasures may be set whether or not the low-temperature countermeasures are required in two stages such as “necessary” and “absolutely necessary”. Then, in a case where it is set that the countermeasures are “necessary”, it is informed to urge that the switch be turned on, but any low-temperature processing is not performed at a time when the switch is turned off. On the other hand, in a case where it is set that the countermeasures are “absolutely necessary”, and the switch remains to be off, it is judged that there is securely a problem due to the low temperature, and the low-temperature countermeasures are automatically executed even when the switch is off. Such control may be performed.
  • the low-temperature countermeasure switch SW 1 when the ambient temperature To or the remote-part temperature Tp is a reference temperature Ts or more, the low-temperature countermeasure switch SW 1 is automatically turned on, but the switch SW 1 may be turned on only in a case where both the conditions are satisfied.
  • the control for the low-temperature countermeasures is automatically executed.
  • a rapid temperature change is sometimes generated.
  • the control for the low-temperature countermeasures is not required.
  • a problem that a fuel gas is uselessly consumed or the like is generated.
  • the following third embodiment has been developed to solve such a problem, and an object thereof is to provide a fuel cell system capable of preventing that control for low-temperature countermeasures is unnecessarily performed, to suppress a problem that a fuel gas is uselessly consumed or the like.
  • FIG. 6 is a flow chart showing the operation of a fuel cell system 100 according to the third embodiment. It is to be noted that steps corresponding to those of the flow chart shown in FIG. 2 are denoted with the same reference numerals, and detailed description thereof is omitted.
  • a control unit 80 On detecting that the start request (the turning-on of an ignition switch or the like) of the system has been input (Step S 1 ), a control unit 80 (first judgment means) performs first low-temperature judgment based on an ambient temperature To detected by an ambient temperature sensor 190 and a remote-part temperature Tp detected by a part temperature sensor 195 (Step S 2 ). This will be described in detail.
  • the control unit 80 compares the ambient temperature To and the remote-part temperature Tp with a preset first reference temperature Ts 1 (e.g., 0° C.) to judge whether or not the ambient temperature To and the remote-part temperature Tp are lower than the first reference temperature (e.g., 0° C.) Ts 1 .
  • the detected ambient temperature To is stored in a time series order with respect to a temperature detection memory (not shown).
  • Step S 2 When the ambient temperature To or the remote-part temperature Tp is 0° C. or more, the control unit 80 judges that the control for the low-temperature countermeasures is unnecessary, and starts ordinary run (Step S 2 ⁇ Step S 10 ). On the other hand, in a case where the control unit 80 judges that the ambient temperature To or the remote-part temperature Tp is lower than 0° C., the control unit turns on a first low-temperature judgment flag stored in a memory (not shown) (Step S 2 ⁇ Step S 230 ), and then advances to Step S 6 .
  • Step S 6 the control unit 80 judges whether or not there has been the stop request of the system. In a case where it is judged that there is not any request (Step S 6 ; NO), the control unit returns to Step S 2 in the same manner as described above, thereby executing the above series of processing.
  • the control unit (second judgment means) 80 performs second low-temperature judgment based on the ambient temperature To detected by the ambient temperature sensor 190 (Step S 240 ). This will be described in detail.
  • the control unit 80 judges that the obtained differential temperature Td is the preset differential threshold value Tt or more or that the presently detected ambient temperature Tor is 0° C. or more, the control unit does not perform any control for the low-temperature countermeasures, and stops the system.
  • Step S 250 the control unit 80 advances to Step S 250 to judge whether or not the first low-temperature judgment flag has been turned on.
  • the control unit 80 When the first low-temperature judgment flag is not turned on, the control unit 80 does not perform any control for the low-temperature countermeasures, and stops the system. On the other hand, when the first low-temperature judgment flag is turned on, the control unit (control means) 80 turns on a low-temperature countermeasure switch SW 1 (Step S 260 ), and then executes sweep processing or the like as the control for the low-temperature countermeasures (Step S 8 ). Such sweep processing can be executed to decrease a water content accumulated in a pipe or the like, and it is possible to suppress a problem that the water accumulated in the pipe freezes and damages the pipe. When the control for the low-temperature countermeasures ends, the control unit 80 performs the stop processing in the same manner as described above (Step S 9 ), thereby ending the processing.
  • the control for the low-temperature countermeasures is not executed, so that it is possible to prevent a problem that the control for the low-temperature countermeasures is unnecessarily performed to uselessly consume a fuel gas.
  • the second low-temperature judgment is performed based on the ambient temperature, but instead of this (or additionally), the second low-temperature judgment may be performed based on the remote-part temperature.
  • first reference temperature Ts 1 and the second reference temperature Ts 2 “0° C.” has been illustrated, but another temperature (e.g., 5° C.) may be used, or the reference temperatures Ts 1 , Ts 2 may be different from each other.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
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  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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US12/301,284 2006-05-23 2007-04-19 Fuel cell system Abandoned US20090191438A1 (en)

Applications Claiming Priority (3)

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JP2006-142783 2006-05-23
JP2006142783A JP5152614B2 (ja) 2006-05-23 2006-05-23 燃料電池システム
PCT/JP2007/058999 WO2007135839A1 (ja) 2006-05-23 2007-04-19 燃料電池システム

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US (1) US20090191438A1 (ko)
JP (1) JP5152614B2 (ko)
KR (1) KR101047521B1 (ko)
CN (1) CN101449415B (ko)
DE (1) DE112007001182B4 (ko)
WO (1) WO2007135839A1 (ko)

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JP5332353B2 (ja) * 2008-07-07 2013-11-06 カシオ計算機株式会社 燃料供給装置及び燃料供給システム
JP5538014B2 (ja) * 2010-03-19 2014-07-02 本田技研工業株式会社 燃料電池システム
EP3086379B1 (en) 2015-04-24 2018-11-28 STMicroelectronics Srl Thermoelectric energy harvesting device
DE102018205177A1 (de) * 2018-04-06 2019-10-10 Audi Ag Verfahren zur Berücksichtigung von Froststartbedingungen bei einem Neustart eines Brennstoffzellensystems sowie Vorrichtung zur Durchführung des Verfahren
JP7119705B2 (ja) * 2018-07-26 2022-08-17 トヨタ自動車株式会社 燃料電池システム

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CN101449415B (zh) 2011-12-07
DE112007001182T5 (de) 2009-02-26
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CN101449415A (zh) 2009-06-03
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